Elas4RDF: Multi-perspective Triple-Centered Keyword Search over RDF Using Elasticsearch. - Giorgos Kadilierakis; Christos Nikas; Pavlos Fafalios; Panagiotis Papadakos; Yannis Tzitzikas (ESWC (Satellite Events), 2020)

Two-stage Semantic Answer Type Prediction for Question Answering using BERT and Class-Specificity Rewarding. - Christos Nikas; Pavlos Fafalios; Yannis Tzitzikas (SMART@ISWC, 2020)

Keyword Search over RDF: Is a Single Perspective Enough? - Christos Nikas; Giorgos Kadilierakis; Pavlos Fafalios; Yannis Tzitzikas (Big Data Cogn. Comput., 2020)

Open Domain Question Answering over Knowledge Graphs Using Keyword Search, Answer Type Prediction, SPARQL and Pre-trained Neural Models. - Christos Nikas; Pavlos Fafalios; Yannis Tzitzikas (ISWC, 2021)

An Evaluation of the Effectiveness of Labor Market Integration Policies in EU Member States Using PROMETHEE. - Anastasia Blouchoutzi; Panagiota Digkoglou; Jason Papathanasiou; Christos Nikas (Int. J. Oper. Res. Inf. Syst., 2021)

Strengthening EU Resilience: Labor Market Integration as a Criterion for Refugee Relocation. - Anastasia Blouchoutzi; Georgios Tsaples; Dimitra Manou; Christos Nikas (ICDSST, 2022)